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Specialized - Cathode Ray ·CathodeRay

3MP7

Three-inch cathode-ray tube for oscilloscope and instrument display service, using electrostatic focusing and electrostatic deflection. Its P7 screen designation identifies the phosphor variant within this compact oscillographic family.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
6.3 V / 600 mA

Description

from JEDEC release #3022, Nov. 7, 1960 [ 3MP2 GENERAL DATA OSCILLOSCOPE TUBE Focusing Method ... cetneeeserse e Electrostatic DEFLECTION SENS!TIVITY—MODERATE Deflecting Method .. . Electrostatic LENGTH—SHORT

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
6.3 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Cathode Ray

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

CRT section; maximum anode voltage 2750 V and capacitances retained in parameter table.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1960 Waterman Products

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Other

  • RAYONIC®

    3

    RAYONIC® 3MP1 CATHODE RAY TUBE

  • Heater VOltage ..vrcmeecrnmmmnnssimssonion e

    3 mm

    Heater VOltage ..vrcmeecrnmmmnnssimssonion e 003 VOIS

  • Heater Current ... s [1]

    600 mA

    Heater Current ... s 0.6 +=10% Amperes

  • Heater Current ... s [2]

    10 A

    Heater Current ... s 0.6 +=10% Amperes

  • Cathode to all other electrodes ..o

    7.5

    Cathode to all other electrodes ..o 7.5 upf

  • Grid # [1]

    1 pF

    Grid #1 to all other electrodes ... 8.0 ppf

  • Grid # [2]

    8 pF

    Grid #1 to all other electrodes ... 8.0 ppf

  • Minimum Useful Screen DIameter

    2 in

    Minimum Useful Screen DIameter ... 2% Inches

  • Positive voltage on D1 deflects beam approximately toward pin #

    4

    Positive voltage on D1 deflects beam approximately toward pin #4

  • Positive voltage on D3 deflects beam approximately toward pin #

    1

    Positive voltage on D3 deflects beam approximately toward pin #1

  • Anode Voltage (A2)

    2190

    Anode Voltage (A2) .. 2190 VOIEs DC

  • Anode (A2) Input ..o

    6

    Anode (A2) Input ..o . 6 Watts

  • Anode = [1]

    1 V

    Anode =1 (Focusing Electrode) Voltage ... .. 1000 Volts

  • Anode = [2]

    1000 V

    Anode =1 (Focusing Electrode) Voltage ... .. 1000 Volts

  • Grid

    41

    Grid 41 (G1) Voltage

  • Heater positive with respect to cathode ... T

    125 V

    Heater positive with respect to cathode ... T 125 Volts

  • Peak Voltage between Anode # [1]

    2 V

    Peak Voltage between Anode #2 and any deflecting Plate i 500 Volts

  • Peak Voltage between Anode # [2]

    500 V

    Peak Voltage between Anode #2 and any deflecting Plate i 500 Volts

  • Focusing Electrode (A1) Current for any operating condition [1]

    -15 A

    Focusing Electrode (A1) Current for any operating condition ... —15t0 +10 pAmps

  • Focusing Electrode (A1) Current for any operating condition [2]

    10 A

    Focusing Electrode (A1) Current for any operating condition ... —15t0 +10 pAmps

  • Spot Position (Undeflected) (Note [1]

    1 mm

    Spot Position (Undeflected) (Note 1) 15 Max. mm

  • Spot Position (Undeflected) (Note [2]

    15 mm

    Spot Position (Undeflected) (Note 1) 15 Max. mm

  • Al Voltage [1]

    12

    Al Voltage 12% to 30% of A2 Voltage

  • Al Voltage [2]

    30

    Al Voltage 12% to 30% of A2 Voltage

  • G1 Voltage [1]

    2.7

    G1 Voltage 2.7% to 6.3% of A2 Voltage (Note 2)

  • G1 Voltage [2]

    6.3

    G1 Voltage 2.7% to 6.3% of A2 Voltage (Note 2)

  • G1 Voltage [3]

    2

    G1 Voltage 2.7% to 6.3% of A2 Voltage (Note 2)

  • Anode Voltage (A2) [1]

    500 V

    Anode Voltage (A2) 500 1000 2000 Volts

  • Anode Voltage (A2) [2]

    1000 V

    Anode Voltage (A2) 500 1000 2000 Volts

  • Anode Voltage (A2) [3]

    2000 V

    Anode Voltage (A2) 500 1000 2000 Volts

  • Focusing Electrode Voltage (A1) [1]

    60 V

    Focusing Electrode Voltage (A1) 60 to 150 120 to 300 240 to 600 | Volts

  • Focusing Electrode Voltage (A1) [2]

    150 V

    Focusing Electrode Voltage (A1) 60 to 150 120 to 300 240 to 600 | Volts

  • Focusing Electrode Voltage (A1) [3]

    120 V

    Focusing Electrode Voltage (A1) 60 to 150 120 to 300 240 to 600 | Volts

  • Focusing Electrode Voltage (A1) [4]

    300 V

    Focusing Electrode Voltage (A1) 60 to 150 120 to 300 240 to 600 | Volts

  • Focusing Electrode Voltage (A1) [5]

    240 V

    Focusing Electrode Voltage (A1) 60 to 150 120 to 300 240 to 600 | Volts

  • Focusing Electrode Voltage (A1) [6]

    600 V

    Focusing Electrode Voltage (A1) 60 to 150 120 to 300 240 to 600 | Volts

  • Grid # [1]

    1 V

    Grid #1 Voltage (Note 2) ~13.5t0 -31.5 [—27to —63 | —54to —126| Volts

  • Grid # [2]

    2 V

    Grid #1 Voltage (Note 2) ~13.5t0 -31.5 [—27to —63 | —54to —126| Volts

  • Grid # [3]

    13.5 V

    Grid #1 Voltage (Note 2) ~13.5t0 -31.5 [—27to —63 | —54to —126| Volts

  • Grid # [4]

    -31.5 V

    Grid #1 Voltage (Note 2) ~13.5t0 -31.5 [—27to —63 | —54to —126| Volts

  • Grid # [5]

    -27 V

    Grid #1 Voltage (Note 2) ~13.5t0 -31.5 [—27to —63 | —54to —126| Volts

  • Grid # [6]

    -63 V

    Grid #1 Voltage (Note 2) ~13.5t0 -31.5 [—27to —63 | —54to —126| Volts

  • Grid # [7]

    -54 V

    Grid #1 Voltage (Note 2) ~13.5t0 -31.5 [—27to —63 | —54to —126| Volts

  • Grid # [8]

    -126 V

    Grid #1 Voltage (Note 2) ~13.5t0 -31.5 [—27to —63 | —54to —126| Volts

  • Deflection Factor D1-D2 [1]

    57.51072 V

    Deflection Factor D1-D2 57.51072.5 115to0 145 23010290 | Volts DC/Inch

  • Deflection Factor D1-D2 [2]

    5 V

    Deflection Factor D1-D2 57.51072.5 115to0 145 23010290 | Volts DC/Inch

  • Deflection Factor D1-D2 [3]

    115 V

    Deflection Factor D1-D2 57.51072.5 115to0 145 23010290 | Volts DC/Inch

  • Deflection Factor D1-D2 [4]

    145 V

    Deflection Factor D1-D2 57.51072.5 115to0 145 23010290 | Volts DC/Inch

  • Deflection Factor D1-D2 [5]

    23010290 V

    Deflection Factor D1-D2 57.51072.5 115to0 145 23010290 | Volts DC/Inch

  • Deflection Factor D3-D4 [1]

    55 V

    Deflection Factor D3-D4 55t0 70 i10to 140 220to 280 | Volts DC/Inch

  • Deflection Factor D3-D4 [2]

    70 V

    Deflection Factor D3-D4 55t0 70 i10to 140 220to 280 | Volts DC/Inch

  • Deflection Factor D3-D4 [3]

    0 V

    Deflection Factor D3-D4 55t0 70 i10to 140 220to 280 | Volts DC/Inch

  • Deflection Factor D3-D4 [4]

    140 V

    Deflection Factor D3-D4 55t0 70 i10to 140 220to 280 | Volts DC/Inch

  • Deflection Factor D3-D4 [5]

    220 V

    Deflection Factor D3-D4 55t0 70 i10to 140 220to 280 | Volts DC/Inch

  • Deflection Factor D3-D4 [6]

    280 V

    Deflection Factor D3-D4 55t0 70 i10to 140 220to 280 | Volts DC/Inch

  • Grid # [1]

    1

    Grid #1 Circuit Resistance . 1.5 Megohms

  • Grid # [2]

    1.5

    Grid #1 Circuit Resistance . 1.5 Megohms

  • Resistance in any Deflecting Electrode Circuit (NOte [1]

    3 mm

    Resistance in any Deflecting Electrode Circuit (NOte 3) wcrmcrssmmessmns 1.0 Megohms

  • Resistance in any Deflecting Electrode Circuit (NOte [2]

    1 mm

    Resistance in any Deflecting Electrode Circuit (NOte 3) wcrmcrssmmessmns 1.0 Megohms

  • Published value

    1

    1. With deflecting electrodes connected to Anode (A2).

  • Published value

    2

    2. For visual extinction of undeflected focused spot.

  • Published value

    3

    3. The resistance in each deflecting electrode circuit should be approximately equal.

  • fiuorescent, yellow phosphorescent, long persistence phosphor. Use of

    3

    fiuorescent, yellow phosphorescent, long persistence phosphor. Use of 3MP7 at anode voltages below